Automatic synchronization with publicsuffix.org

* Added automatic downlod of effective_tld_names.dat from publicsuffix.org to remove manual action
* Automatically and directly update src/domain_list.js
* Using variable to hold file names to make the code more readable
* Removing unnecessary files
Syncing with publicsuffix.org

* Updating domain_list.js with latest available data
* Storing effective_tld_names.dat as cache. It could be removed on a later stage
Removing release folder

README.md now have direct link to Google Chrome Web Store to download the extension
Including link to Google Chrome Web Store

to download the most updated version